WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!

SSH访问远程主机时，出现这种情况的解决办法：

[kiosk@fundation20 Desktop]$ ssh root@172.25.20.1
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
8b:a9:67:d4:9c:78:34:b2:4f:87:61:cb:56:ac:78:4c.
Please contact your system administrator.
Add correct host key in /home/kiosk/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /home/kiosk/.ssh/known_hosts:4
RSA host key for 172.25.20.1 has changed and you have requested strict checking.
Host key verification failed.

如下图

方法一

• 直接删除/home/kiosk/.ssh/known_hosts文件,再次连接时会重新生成

[kiosk@fundation20 ~]$ rm -fr /home/kiosk/.ssh/known_hosts

方法二

• 例如我这里所要连接的IP是172.25.20.1
• 删掉里面与所要连接IP（172.25.20.1）相关的内容

[kiosk@fundation20 ~]$vi /home/kiosk/.ssh/known_hosts

再次连接成功！

[[e-mail] Desktop]$ ssh [e-mail]172.25.20.1
The authenticity of host '172.25.20.1 (172.25.20.1)' can't be established.
RSA key fingerprint is 8b:a9:67:d4:9c:78:34:b2:4f:87:61:cb:56:ac:78:4c.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '172.25.20.1' (RSA) to the list of known hosts.
[e-mail]172.25.20.1's password: 
Last login: Tue Jan 30 19:50:06 2018 from 172.25.20.250
[[e-mail] ~]#